摘要
采用热失重分析(TG)和原位红外研究了含有不饱和双键和羟基的单甲基丙烯酸锌(HZMMA)的化学反应行为;采用X射线衍射(XRD)、扫描电子显微镜(SEM)研究了HZMMA由于其官能团的反应而发生的结构与形态变化。结果表明,针状的HZMMA晶体在引发剂的作用下能自聚形成大小不等的粒子,证实了HZMMA作为反应型增强剂用于制备离子聚合物/聚氨酯(脲)弹性体合金的可能性。以HZMMA作为增强剂,采用预聚体法,以PTMG-1000/甲基二异氰酸酯(TDI)为原料制备预聚物,与自制的混合扩链剂制备出了含有不同量的离子聚合物聚氨酯(脲)弹性体合金,研究了HZMMA的用量对离子聚合物/聚醚型聚氨酯(脲)合金力学性能的影响。当HZMMA的质量分数为0.2%、过氧化二异丙苯(DCP)质量分数为0.2%时,离子聚合物/聚醚型聚氨酯(脲)合金表现出最优的力学性能。
HZMMA is a zinc salt which has unsaturated carboxylic acids and a hydroxyl.We investigated the chemical behaviors of the HZMMA by differential scanning calorimetry （DSC）,thermal gravimetric analysis （TG）and in situ FTIR.The morphological changes were got by scanning electron microscope （SEM） and X-ray diffraction （XRD）.The experimental results showed that HZMMA is a kind of acicular crystals and can have the self-polymeric reaction forming different sizes of poly-HZM-MA particles with the initiator.The results also indicated that it is possible for HZMMA to be used as a reactive enhancer to prepare the ionic polymers/polyethers polyurethane elastomer composites.The prepolymer which was synthesized with polytetramethylene ether glycol （PTMG-1000）and 2,4-diisocyanate methyltoluene （TDI） reacted with the self made chain extenders which consists of dimethylthio toluene diamine （DMTDA）,HZMMA and dicumyl peroxide （DCP） to get the ionic polymers/ polyethers polyurethane elastomer composites which have different contents of ionic polymers.When the mass fraction of HZMMA is 0.2 ％ and DCP is 0.2 ％,the mechanical properties of ionic polymers/ polyethers polyurethane elastomer composites can reach the best.
出处
《弹性体》
CAS
2014年第4期13-18,共6页
China Elastomerics
基金
国家自然科学基金资助项目(21176126)
